CN102854089A - Detection method of molding porosity - Google Patents
Detection method of molding porosity Download PDFInfo
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- CN102854089A CN102854089A CN2012103375397A CN201210337539A CN102854089A CN 102854089 A CN102854089 A CN 102854089A CN 2012103375397 A CN2012103375397 A CN 2012103375397A CN 201210337539 A CN201210337539 A CN 201210337539A CN 102854089 A CN102854089 A CN 102854089A
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Abstract
The invention discloses a detection method of a molding porosity. The method comprises the steps that: (1) a formula below is adopted; masses of a sample in air and in water are respectively measured in two times, and sample density is calculated, wherein m in air represents the mass of the sample measured in air, and .m in water represents the mass of the sample measured in water; (2) densities of a rubber and plastic material before and after molding are measured; and the porosity of the rubber and plastic material is calculated according to a formula below, wherein rho before molding represents the density of the sample before molding, and rho after molding represents the density of the sample after molding. Compared with prior arts, with the molding porosity detection method provided by the invention, rubber and plastic material porosity after molding can be rapidly and quantitatively detected. Therefore, the method has an important significance in controlling product quality. Because the rubber and plastic material is widely applied in industrial productions and daily lives, the method and a device for detecting material molding porosity have wide application scope.
Description
Technical field
The present invention relates to field of high polymer material processing, exactly refer to a kind of detection method of shaped air holes rate.
Background technology
At present, in the production run of rubber tyre, the rubber components porosity after the sizing material extrusion molding is an important technology controlling and process index, but the porosity of how accurately and easily measuring after the sizing material extrusion molding is the manufacturing difficult problem of puzzlement tire always.Because rubber-moulding posterior spiracle rate relates to the volume that will survey sizing material moulding front and back, and for the processing mode of continuous feeding, discharging, all inconvenience measurements of volume that moulding is forward and backward, therefore survey the general method that adopts of the porosity and be by rule of thumb or the reference standard photo range estimation cross section porosity, the method and apparatus that there is no can accurately and easily be measured the rubber porosity, therefore also moulding posterior spiracle rate is not quantitatively controlled.Make a general survey of other processing of high molecular material industries, the problem that also exists the inconvenience of moulding posterior spiracle rate to detect.Because the macromolecular material such as product of rubber and plastic is widely used in commercial production and the daily life, the porosity of quantitatively controlling after the rubber-plastics material moulding is significant to the control product quality, so the pick-up unit of shaped air holes rate also has very wide usable range.
Summary of the invention
For defects, the technical matters that the present invention solves is to provide a kind of detection method of shaped air holes rate, can fast quantification measures the porosity after the rubber-plastics material moulding, and is significant to the control product quality; And because product of rubber and plastic is widely used in commercial production and the daily life, the method and apparatus of the forming materials porosity should have very wide range of application.
In order to solve above technical matters, the detection method of shaped air holes rate provided by the invention comprises the steps:
(1), using formula:
Record respectively at twice the density that calculates sample after the quality of sample in air and in water, m
In the airRepresent the quality that sample is measured in air, m
In the waterRepresent the quality that sample is measured in water;
(2), surveyed before the rubber-plastics material moulding, after the density after the moulding, by formula:
Calculate the porosity of rubber-plastics material, ρ
Before the mouldingRepresent the front density of sample moulding,
ρ After the moulding Represent the density after the sample moulding.
Preferably, in the step (2), for rubbery sample, the density before the moulding: with the density after the rubber sample sulfuration before the moulding, or the density data that records when controlling the finished composition quality with batch rubber, perhaps use the standard density of this kind rubber; Density after the moulding: the density that the type glue sampling after moulding records.
Preferably, in the step (2), for plastic sample, the density before the moulding: the density that records with before the moulding or same batch plastics, or with the standard density of this kind plastics; Density after the moulding: the plastic sample sampling after moulding records density.
Preferably, in the step (1), used water need be distilled water during the quality of test sample in water; And in the standard test room temperature, test.
Preferably, in the step (1), test sample need to reach following condition:
Sampling requirement: for each sample mass be at least 1 the gram, and specimen surface is smooth, smooth, without greasy dirt, without bubble and inclusion-free;
Adjustment: before the rubber and plastic moulding and the sample of doing after the moulding all should be at standard test room temperature downward modulation joint more than 30 minutes, or in laboratory standard temperature tank, regulate more than 5 minutes;
Sample cleans: during the weight of test sample in water, specimen surface retains bubble in water in order to avoid, and puts into industrial spirit with tweezers clamping sample and cleans, and cleans in distilled water, at last the quality of test sample in water just again.
The detection method of shaped air holes rate provided by the invention, utilize the incompressible characteristic of rubber-plastics material, be the own volume of material before and after the moulding processing, be equal in weight, suppose the front pore-free of forming materials, and the weight of ignoring moulding posterior spiracle Air, then the volume ratio before and after the moulding and the density ratio before and after the moulding are inversely proportional to, that is:
Before like this will the moulding for Calculating material shaped air holes rate, the volume ratio after the moulding convert moulding to after, the density ratio before the moulding, that is:
And density of material density available measuring instrument is measured (can be accurate to 0.001g/cm3) fast and accurately, utilizes the density data that forward and backward two degree of moulding are measured, substitution:
Calculate the shaped air holes rate of rubber-plastics material, wherein the mensuration of sample density uses Archimedes' principle to derive: sample density
Namely adopt analytical balance to measure respectively the aerial quality m of sample
In the airWith the quality m in the water
In the water, calculate sample density, ρ
WaterThe density that refers to distilled water.Compared with prior art, the detection method of shaped air holes rate provided by the invention can fast quantification be measured the porosity after the rubber-plastics material moulding, and is significant to the control product quality; And because product of rubber and plastic is widely used in commercial production and the daily life, the method and apparatus of the forming materials porosity should have very wide range of application.
Embodiment
For those skilled in the art can understand technical scheme provided by the present invention better, set forth below in conjunction with specific embodiment.
Embodiment 1
The detection method of the shaped air holes rate that the present embodiment provides comprises the steps:
(1), using formula:
Record respectively at twice the density that calculates sample after the quality of sample in air and in water, m
In the airRepresent the quality that sample is measured in air, m
In the waterRepresent the quality that sample is measured in water;
(2), surveyed before the rubber-plastics material moulding, after the density after the moulding, by formula:
Calculate the porosity of rubber-plastics material, ρ
Before the mouldingRepresent the front density of sample moulding,
ρ After the moulding Represent the density after the sample moulding.
For rubbery sample, the density before the moulding: with the density after the rubber sample sulfuration before the moulding, or the density data that records when controlling the finished composition quality with batch rubber, perhaps use the standard density of this kind rubber; Density after the moulding: the density that the type glue sampling after moulding records.
In the step (1), used water need be distilled water during the quality of test sample in water; And test in the standard test room temperature, the standard test room temperature is 27 ℃ ± 2 ℃, and test sample need to reach following condition:
Sampling requirement: for each sample mass be at least 1 the gram, and specimen surface is smooth, smooth, without greasy dirt, without bubble and inclusion-free;
Adjustment: before the rubber and plastic moulding and the sample of doing after the moulding all should be at standard test room temperature downward modulation joint more than 30 minutes, or in laboratory standard temperature tank, regulate more than 5 minutes;
Sample cleans: during the weight of test sample in water, specimen surface retains bubble in water in order to avoid, and puts into industrial spirit with tweezers clamping sample and cleans, and cleans in distilled water, at last the quality of test sample in water just again.
Need to prove; the distilled water that uses in the detection method of the shaped air holes rate that the present embodiment provides also can substitute with the liquid of other known densities; can realize purpose of the present invention equally, also belong in protection scope of the present invention, not repeat them here.
Embodiment 2
The detection method of the shaped air holes rate that the present embodiment provides comprises the steps:
(1), using formula:
Record respectively at twice the density that calculates sample after the quality of sample in air and in water, m
In the airRepresent the quality that sample is measured in air, m
In the waterRepresent the quality that sample is measured in water;
(2), surveyed before the rubber-plastics material moulding, after the density after the moulding, by formula:
Calculate the porosity of rubber-plastics material, ρ
Before the mouldingRepresent the front density of sample moulding,
ρ After the moulding Represent the density after the sample moulding.
For plastic sample, the density before the moulding: the density that records with before the moulding or same batch plastics, or with the standard density of this kind plastics; Density after the moulding: the plastic sample sampling after moulding records density.
In the step (1), used water need be distilled water during the quality of test sample in water; And test in the standard test room temperature, the standard test room temperature is 23 ℃ ± 2 ℃, and test sample need to reach following condition:
Sampling requirement: for each sample mass be at least 1 the gram, and specimen surface is smooth, smooth, without greasy dirt, without bubble and inclusion-free;
Adjustment: before the rubber and plastic moulding and the sample of doing after the moulding all should be at standard test room temperature downward modulation joint more than 30 minutes, or in laboratory standard temperature tank, regulate more than 5 minutes;
Sample cleans: during the weight of test sample in water, specimen surface retains bubble in water in order to avoid, and puts into industrial spirit with tweezers clamping sample and cleans, and cleans in distilled water, at last the quality of test sample in water just again.
Need to prove; the distilled water that uses in the detection method of the shaped air holes rate that the present embodiment provides also can substitute with the liquid of other known densities; can realize purpose of the present invention equally, also belong in protection scope of the present invention, not repeat them here.
Compared with prior art, the detection method of shaped air holes rate provided by the invention can fast quantification be measured the porosity after the rubber-plastics material moulding, and is significant to the control product quality; And because product of rubber and plastic is widely used in commercial production and the daily life, the method and apparatus of the forming materials porosity should have very wide range of application.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, in other embodiments realization.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. the detection method of a shaped air holes rate is characterized in that, comprises the steps:
(1), using formula:
Record respectively at twice the density that calculates sample after the quality of sample in air and in water, m
In the airRepresent the quality that sample is measured in air, m
In the waterRepresent the quality that sample is measured in water;
(2), surveyed before the rubber-plastics material moulding, after the density after the moulding, by formula:
Calculate the porosity of rubber-plastics material, ρ
Before the mouldingRepresent the front density of sample moulding,
ρ After the moulding Represent the density after the sample moulding.
2. the detection method of shaped air holes rate according to claim 1, it is characterized in that, in the step (2), for rubbery sample, density before the moulding: with the density after the rubber sample sulfuration before the moulding, or the density data that records with batch rubber control finished composition quality the time, perhaps use the standard density of this kind rubber; Density after the moulding: the density that the type glue sampling after moulding records.
3. the detection method of shaped air holes rate according to claim 1 is characterized in that, in the step (2), and for plastic sample, the density before the moulding: the density that records with before the moulding or same batch plastics, or with the standard density of this kind plastics; Density after the moulding: the plastic sample sampling after moulding records density.
4. the detection method of shaped air holes rate according to claim 1 is characterized in that, in the step (1), used water need be distilled water during the quality of test sample in water; And in the standard test room temperature, test.
5. the detection method of shaped air holes rate according to claim 4 is characterized in that, in the step (1), test sample need to reach following condition:
Sampling requirement: for each sample mass be at least 1 the gram, and specimen surface is smooth, smooth, without greasy dirt, without bubble and inclusion-free;
Adjustment: before the rubber and plastic moulding and the sample of doing after the moulding all should be at standard test room temperature downward modulation joint more than 30 minutes, or in laboratory standard temperature tank, regulate more than 5 minutes;
Sample cleans: during the weight of test sample in water, specimen surface retains bubble in water in order to avoid, and puts into industrial spirit with tweezers clamping sample and cleans, and cleans in distilled water, at last the quality of test sample in water just again.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458495A (en) * | 2014-11-28 | 2015-03-25 | 中国科学院金属研究所 | Method for measuring particle volume fraction of reinforced body in particle-reinforced metal-based composite material |
| CN109655491A (en) * | 2019-01-15 | 2019-04-19 | 安徽奥特佳科技发展有限公司 | A kind of aluminum alloy die casting stomata and shrinkage cavity defect overall quality detection method |
| CN112924328A (en) * | 2021-01-26 | 2021-06-08 | 特拓(青岛)轮胎技术有限公司 | Online testing method for density ratio of rubber part based on section online scanning and automatic weighing technology |
| CN113155703A (en) * | 2021-04-28 | 2021-07-23 | 特拓(青岛)轮胎技术有限公司 | Method for testing porosity of rubber |
| CN113405963A (en) * | 2020-03-17 | 2021-09-17 | 中策橡胶集团有限公司 | Method for measuring porosity of tread product |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104458495A (en) * | 2014-11-28 | 2015-03-25 | 中国科学院金属研究所 | Method for measuring particle volume fraction of reinforced body in particle-reinforced metal-based composite material |
| CN104458495B (en) * | 2014-11-28 | 2017-01-18 | 中国科学院金属研究所 | Method for measuring particle volume fraction of reinforced body in particle-reinforced metal-based composite material |
| CN109655491A (en) * | 2019-01-15 | 2019-04-19 | 安徽奥特佳科技发展有限公司 | A kind of aluminum alloy die casting stomata and shrinkage cavity defect overall quality detection method |
| CN113405963A (en) * | 2020-03-17 | 2021-09-17 | 中策橡胶集团有限公司 | Method for measuring porosity of tread product |
| CN112924328A (en) * | 2021-01-26 | 2021-06-08 | 特拓(青岛)轮胎技术有限公司 | Online testing method for density ratio of rubber part based on section online scanning and automatic weighing technology |
| CN113155703A (en) * | 2021-04-28 | 2021-07-23 | 特拓(青岛)轮胎技术有限公司 | Method for testing porosity of rubber |
| CN113155703B (en) * | 2021-04-28 | 2022-05-31 | 特拓(青岛)轮胎技术有限公司 | Method for testing porosity of rubber |
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| CN102854089B (en) | 2016-05-25 |
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Effective date of registration: 20180619 Address after: 231137 Pioneer Road, gang Ji Town, Changfeng County, Hefei, Anhui Patentee after: Hefei Wanli Tyre Co., Ltd. Address before: 511400 116 East Ring Road, east ring street, Panyu District, Guangzhou, Guangdong. Patentee before: Guangzhou South China Rubber Tyre Co., Ltd. |
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